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Finding the Fourth Proportional to 78,699.44, 117,923.88 and 55,051.76

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Solution

The fourth proportional to 78,699.44, 117,923.88 and 55,051.76 is: 82,490.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,699.44 : 117,923.88 = 55,051.76 : x
  2. Step 2: Convert to fraction form
    78,699.44/117,923.88 = 55,051.76/x
  3. Step 3: Cross multiply
    78,699.44x = 117,923.88 × 55,051.76
  4. Step 4: Simplify right side
    78,699.44x = 6,491,917,140.03
  5. Step 5: Solve for x
    x = 6,491,917,140.03/78,699.44
  6. Step 6: Final answer
    x = 82,490.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.